Variability in the Lambda Orionis cluster substellar domain
Astrophysics
2009-11-11 v1
Abstract
We present the first results on variability of very low mass stars and brown dwarfs belonging to the 5 Myr Lambda Orionis cluster (Collinder 69). We have monitored almost continuously in the J filter a small area of the cluster which includes 12 possible members of the cluster during one night. Some members have turned to be short-term variable. One of them, LOri167, has a mass close to the planetary mass limit and its variability might be due to instabilities produced by the deuterium burning, although other mechanism cannot be ruled out.
Cite
@article{arxiv.astro-ph/0510402,
title = {Variability in the Lambda Orionis cluster substellar domain},
author = {David Barrado y Navascues and Nuria Huelamo and Maria Morales Calderon},
journal= {arXiv preprint arXiv:astro-ph/0510402},
year = {2009}
}
Comments
Accepted for Astronomische Nachrichten. Workshop "Ultra-low-mass star formation and evolution", La Palma June 2005